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Use *Prunella vulgaris* (Xiakucao, 夏枯草), in any quantity. Boil it in a pot until soft and rotten, remove the dregs, extract the juice, and boil it down into an ointment for external application.

Acquired toxins from postnatal life are easy to identify, whereas congenital toxins inherited from prenatal life are difficult to clarify. In mild cases, they manifest as sores. Initially resembling urticaria (wind hives), they gradually develop into small scrofula (lymphatic tuberculosis). Once scratched and itchy, they exude dampness and spread like tinea (ringworm), starting from the head and covering the whole body, appearing up and down according to the pathogenic influence. These sores contain "worms," hence named "Chongbao" (Insect Nest), implying their origin from the fetal womb. This is always due to the mutual aggression of dampness and fire, with excessive blood heat and toxicity. As the couli (pores and skin texture) become more open, the pernicious toxins become even more rampant. Itching is often attributed to Qi deficiency, while pain is attributed to Blood deficiency; the symptoms belong to the Fu organs. If the condition persists for a long time, leading to Qi and Blood deficiency, the pathology arises from heat and further invades the interior due to the deficiency attacking via heat. The treatment should prioritize supporting the interior and resolving toxicity. However, if nodules form on the neck during recovery, this indicates the upward rush of various toxins from the Six Yang meridians, a sign of flaming fire toxins rising. If sores appear on the neck from the onset, it signifies that congenital toxins are abundant and invading the Yang regions from above. If hair is sparse and there are white scales on the face, persisting for a long time without healing, it is called "Tuchuang" (Bald Sore). There are also cases where adults suffer from "Naogan" (Brain Chancre), presenting with bald patches where hair does not grow. This is because the Kidney meridian of Foot-Shaoyin manifests in the hair; due to Chancre-heat damaging the blood and Qi, the reduced Qi and Blood fail to nourish the hair. Sores confined to the limbs indicate long-standing Spleen deficiency and invasion by damp-toxins. The so-called "Jingchuang" (Fright Sore) implies that fright itself has no physical substance; it results from trauma disrupting Qi and Blood. In the Zang organs, it forms accumulations; in the Fu organs, it overflows into the skin, forming sores. "Lianyin Chuang" (Silver Polishing Sore) refers to sores arising between the eyebrows, indicating Lung heat. "Fengchuang" (Wind Sore) also spreads over the whole body but is very small, commonly known as Scabies ("Jie"). "Chongke Chuang" (Insect Hive Sore) contains worms within the hive, such as fine nits. Regarding the treatment of various sores: if pain and itching are unbearable, or if the patient is irritable, dark-faced, and has blood heat, bitter-cold herbs should be used, such as *Scutellariae Radix* (Huangqin, 黄芩), *Coptidis Rhizoma* (Huanglian, 黄连), and *Sophorae Flavescentis Radix* (Kushen, 苦参). For obese individuals, the main approach should be dispelling wind, drying dampness, and clearing fire. In cases following chronic illness, where dampness steams outward, only tonification and support are needed; one must avoid frequent bathing or applying astringent topical treatments, which might cause toxins to invade inward. Although all sores are related to Heart fire, when using cold-cooling methods, one must note that heat promotes circulation while cold causes stagnation. Stagnation leads to toxin retention and difficulty in recovery. Therefore, it is better to use methods that penetrate the muscle layer to resolve toxicity, harmonize Blood, and nourish Yin. This extinguishes wind-fire, removes dryness and itching, and ensures sufficient and solid Qi and Blood, preventing various toxins from causing harm. If sores appear after smallpox or chickenpox, it is due to residual toxins; detoxification and blood harmonization are appropriate. If convulsions occur before or after the appearance of sores, they are caused by the sores themselves; the primary treatment should focus on managing the sores. For all congenital toxins, cooling Blood, resolving toxicity, and clearing heat are indicated to disperse toxins outward. One must not lightly resort to external treatments alone, which could cause heat-toxins to invade inward, leading to fatal outcomes, especially since children's Zang-Fu organs are delicate, making pathogens easy to enter but hard to expel. If the sores turn scorched and dry, the abdomen turns blue-black, sores produce no pus, or if the entire body is covered with toxic sores swelling on the flanks, lower abdomen, or the fontanelle, these are all incurable conditions.